Gas burner



T. 'H. CREMER ET AL GAS BURNER pril 21, 1931.

Filed Nov. 50, 1928 Inventors Attorneys y stream, and wherein pneumatic means vPatented Apr. 2l, 1931 UNITED STATES PATENT orties THEODORE H. GRENIER, OF BOYLES, AIU) Elli-.DIES CARLELT, GF BIRM'NGHAIWI, ALABAlvIA GFA S BURNER Application led November 30, 1928. Serial No. 322,778.

Our invention relates to gas burners, more particularly to burners for use in furnaces `and has tor its object the provision of a device of the character designated wherein kan improved mixture of air and gas for combustion is provided.

A further object of our invention is to provide a gas burner of the typ wherein air Jfor combustion is entrained in a flowing gas is provided or el'iecting a more intimate mixture ot the air and gas.

Briefly, our invention is an improvement on a well known type of gas burner wherein the gas for combustion under suitable head is passed through a converging-diverging nozzle which `is open to the atmosphere at the throat sothat air'for combustionis entrained by the liowing gas. Vhilesuch burr ers are in wide use and satisfactory results are obtained therewith, we have found that markedly improved results may be obtained and much higher temperatures attained inr the furnace for a given gas consumption by increasing the intimacy of the gas-air mixture. Vie accomplish this result by means or' jets of air from a suitable source oi" air under pressure which cut the owing mixture of gas and air in a direction having a radial component of motion. rlhis action creates a turbulence in the air-gas stream whereby a most intimate mixture is eected. 7e have found, with our improved apparatus, that furnace temperatures kwhich are 5000 F. higher can be obtained than can be obtained with the same burner and without our improved means for perfecting the air-gas mii-:- ture, all with the saine or less gas consumption.

Apparatus embodying features of our inventionis illustrated in the accompanying` drawings, forming a part of this application, wherein y V1 isa view in elevation showing our improved burner assembled with a furnace;

Fig. 2 is a view in front elevation of our improved mixing device in association with the gas nozzle; and

F ig. 3 is a sectional View taken alongythe line IHK-HI of Fig. 2.

Referring to the drawings for a better understanding of our invention, we show a frag? ment 10, of a furnace wall having an opening I 11 therein for receiving ay mixture of gas and air for combustion and which is supplied to the opening through a conduit 12. i

The conduit 12 diverges at its outer end to provide an intake 13y for gas and air for combustion. Formed or secured on the outer end of the intake 13 is a frame 14 through Y which extends a gas nozzle 16 which is in axialvalignment with the conduit 12 and which terminates at ,17 a slight distance within the intake 13. The nozzle'l is con?V nected to a gassupply conduit 18 through. which gas under suitable pressure is supplied to the apparatus. t l

Fitting within the end of the nozzle- 17 is `a nozzle tip 2O having a diverging opening Vthreaded opening`27 to which is connected a conduit 28 for supplying tlieannular chamber with air underr suitable pressure. 'The front face of the hollow member 26 is vdrilled to provide a pluralityv of small converging openings 29, saidv openings being so arranged as to direct a plurality of jets of air into the stream of gas and air entering the intake 18. The hollow member26 is held in place on the hub portion 23 by means of a ring Q5 which is brazed or otherwise secured to the hub portion.

The operation of our improved apparatus will be apparent. Vhen gas under pressure is supplied to the nozzle 17 and escapes through the nozzle tip 20 in a high velocity jet, it entrains the air from the atmosphere into the intake 13 and delivers it through the opening 11 into the furnae for combustion. At the same time air under suitable pressure is supplied to the hollow member 26 through the conduit 28 and escapes from the converging openings to strike the mixture of air and gas in the intake 13 with a radial component of motion, thereby cutting the air-gas stream at a plurality of points and forcing it into a thorough and intimate mixture. The position of the hollow member 26 with respect to the nozzle may be varied by turning the knurled nut 22 to advance or retard it with respect to the nozzle tip 20.

While the air and gas pressures employed with our improved burner might vary with varying conditions under which coinbiution is to occur and with varying qualities ot gas7 we have been enabled to attain maximum furnace temperatures with a 3 pound gas pressure and with a 2 pound air pressure in the hollow member 26, In careful tests which We have carried. out with our appa` ratus, the temperatures thus attained were around 500 F. higher than where the burner was employed without cutting the air-gas mixture with jets of air.

From the foregoing it will be apparent that We have devised an improved gas burner which is simple of construction and operation and which is capable of effecting a highly improved mixture of air and gas for combustion.

While We have shown our invention in but one form, it will be obvious to those skilled in the art that it is not so limited but is susceptible of various changes and modifications Without departing from the spirit thereof and we desire therefore that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What We claim is:

l. In a gas burner, a conduit having a divergent opening, a gas nozzle in axial alignment with the conduit and adapted to discharge a gas stream into the opening7 means for discharging a plurality of air jets each having a radial component of motion into the opening and crossing the gas stream, and means to vary the origin of the air jets axially of the gas stream.

2. In a gas burner, a conduit having a divergent opening, a gas nozzle in axial alignment with the conduit and adapted to discharge a gas stream into the opening,

tures.

THEODORE H. CREMER. JAMES D. CARLIN. 

